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Westwood Primary School

'If you believe you can do it, you can and you will!'

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Start by completing the 7 Arithmetic questions. 


Today, we looked at missing angles in isosceles triangles. Isosceles triangles have 2 sides and 2 angles that are the same size and we can use this knowledge to work out the missing angles. 


If we know the size of the 3rd angle (the one that isn't the same size), we take it away from 180 then divide the answer by 2. 

If we know the 3rd angle and the size of one of the angles that are the same, then we know the size of the missing angles because it will be the same!


See if you can work out the size of the missing angles on the sheet.